Performance Analysis of WDM Based FSO Communication with Advance Modulation Formats

Shahid, Tooba; Khalid, Fariha; Qamar, Farhan; Shahzadi, Romana; Ali, Mudassar; Qamar, Nouman

doi:10.1109/inmic50486.2020.9318129

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Further enhancement of transmission capacity of FSO can be achieved by employing more OFDM channels transmission simultaneously which can be achieved using Wavelength-Division Multiplexed (WDM) transmission. But WDM technique is costinefficient and requires significant spectral bandwidth (Singh and Malhotra, 2021a;Shahid et al, 2020). An emerging data communication technique namely Mode-Division Multiplexing (MDM) transmits multiple information signals simultaneously by employing distinct spatial modal profiles of a single-frequency channel, thus providing higher spectral and cost effectiveness.…”

Section: Literature Surveymentioning

confidence: 99%

Investigations on Orthogonal-Frequency Division Multiplexed-Mode-Division Multiplexed MM Wave-on-Free Space Optics Transmission using Laguerre-Gaussian Modal Beams

Suman¹,

Kumar²

2021

Journal of Computer Science

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We report the simulation-modelling and evaluation of an integrated Orthogonal-Frequency Division Multiplexed (OFDM)-Mode-Division Multiplexed (MDM) Radio-on-Free Space Optics (Ro-FSO) scheme carrying 2-independent 40 GHz millimetre waves (mm Wave) at 20 Gbps per channel for 5 th generation wireless applications. The reported Ro-FSO scheme transports 2-independent 20 Gbps 4-Quadrature-Amplitude Modulated (4-QAM) signals, each carrying 40 GHz mm Wave signal over 2-distinct Laguerre-Gaussian (LG) modal beams and their performance evaluation is carried out for varying levels of clear and foggy weather. Also, we have taken into consideration the effect of increasing size of optical beam signal on the reported scheme performance. The reported results elucidate favourable transportation of both mm Wave signals along 40 km range for clear sky and 1.5 km for heavy-foggy weather.

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Section: Literature Surveymentioning

confidence: 99%

Investigations on Orthogonal-Frequency Division Multiplexed-Mode-Division Multiplexed MM Wave-on-Free Space Optics Transmission using Laguerre-Gaussian Modal Beams

Suman¹,

Kumar²

2021

Journal of Computer Science

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Performance evaluation of MDM-FSO transmission system for varying atmospheric conditions

Suman

Kumar²

2022

Journal of Optical Communications

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We report the designing of a free-space-optics (FSO) transmission system capable of transmitting high rate information by utilising novel mode division multiplexing (MDM) transmission technique. In the work reported, 2-channels transmitting 10 Gbps data, using either non-return-to-zero (NRZ) encoding scheme or return-to-zero (RZ) encoding scheme are modulated by using different Hermite–Gaussian (HG) modal beams of the single laser beam to realize of 20 Gbps transmission system. The system proposed is simulative analysed under the effect of different weather states. Also, we have compared the bit error rate (BER) and Quality factor (Q Factor) performance for RZ and NRZ encoding schemes in the system for varying weather states. The results reported show that NRZ encoding exhibits a superior performance. Also, we have analysed the system performance by taking into consideration atmospheric scintillation effect and the reported results show notable signal degradation in the presence of scintillation.

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A comprehensive survey of free-space optical communication – modulation schemes, advantages, challenges and mitigations

Bibi,

Baig,

Qamar

et al. 2023

Journal of Optical Communications

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The demand for large bandwidth and high data rates in communication systems has become the main cause of the upgrade of traditional networks into free space optical (FSO) technology. FSO technology has gained significant popularity due to its easy deployment, high data rates, abundant bandwidth, enhanced security, and license-free spectrum utilization. However, the performance of FSO communication systems can be affected by certain limiting factors, such as changes in weather conditions during data transmission. To overcome these challenges and improve FSO performance, various modulation techniques are employed. This article presents a concise overview of the FSO communication system, highlighting different modulation techniques used to enhance its performance, as well as discussing its advantages, applications, and existing challenges. Some advanced modulation formats which are recently introduced in the field of FSO communication such as QPSK, DP-QPSK, QAM, and OFDM are also made part of this paper.

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Performance Analysis of WDM Based FSO Communication with Advance Modulation Formats

Cited by 4 publications

References 14 publications

Investigations on Orthogonal-Frequency Division Multiplexed-Mode-Division Multiplexed MM Wave-on-Free Space Optics Transmission using Laguerre-Gaussian Modal Beams

Investigations on Orthogonal-Frequency Division Multiplexed-Mode-Division Multiplexed MM Wave-on-Free Space Optics Transmission using Laguerre-Gaussian Modal Beams

Performance evaluation of MDM-FSO transmission system for varying atmospheric conditions

A comprehensive survey of free-space optical communication – modulation schemes, advantages, challenges and mitigations

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